Many places in Gamma Terra have lost the technologies necessary to build even matchlock firearms. This forced many communities and peoples to reinvent primitive ranged weapons for hunting and combat. Many of these weapons need their own specialty skill- treat the skill cost as the same as the sling.

 

Weapon	Skill	Acc	Md	Range	Type	Damage	Actions	Clip sz	Clip cost	Hide	Mass	Cost
Atlatl	Ranged Weapons- Atlatl	+2	F	20/40/65	LI/O	d4+1w/d4+2w/ d4+3w	1	-	-	-	.5	25
Great sling	Ranged Weapons- sling	+2	F	30/60/90	LI/O	d6s/d8+1s/ d6w	1	20	3	+3	.5	10
Sling, mud shot	Ranged Weapons- sling	+1	F	10/20/40	LI/O	d3s/d4s/ d4+2s	2	-	-	-	.5	10
Hurlbat	Athletics- throw	+3	F	per STR	LI/O	d4w/d4+2w/ d2m	1	-	-	-	2	30
Javelin, corded	Athletics- throw	0	F	20/40/120	LI/O	d4w/d4+1w/ d4+2w	1	-	-	-	1	25
Throwing sticks	Athletics- throw	+2	F	per STR	LI/O	d4+2s/d6+1s/ d4w	1	-	-	-	1	5
Pilum	Athletics- throw	+3	F	per STR	LI/O	d4+1w/d6+2w/ d4m	1	-	-	-	4	30
Blowgun	Ranged Weapons-b'gun	0	F	10/25/40	LI/O	1s/d2s/1w	3	100	1	+1	.5	5

Atlatl - This weapon allows the wielder to throw javelins farther with greater force.

Great sling - This weapon, also called the huaraca in Central America, gains 15 meters in each catagory if sling bullets are used. The clip size and cost are for sling bullets.

Sling, mud shot - To stun a target instead of killing it, sling "stones" made of mud can be used.

Hurlbat - These stats also work for the handax when thrown. The hurlbat is a very short halberd with a point at the base of the handle (thus any hit causes damage). 

Javelin, corded - These have the same stats as the standard javelin, but the range is increased by 100%, not 50%.

Throwing sticks - This weapon, based on the lipan of Egypt, was a large curved stick. Its range is reduced to that of an object not meant for throwing.

Pilum - This large metal javelin was used by the Romans. It is corded, but due to its weight, can only be thrown as per the Athletics- throw rule.

Blowgun - The blowgun is a hollow tube that is used to fire small needles via air pressure by blowing into one end of it. If any primary damage is inflicted, any poison or drug on the needle has a chance of affecting the target. 

Most of these weapons are weapons are based on G. W. Detwiler's article Before the Bow in Dragon 268. It also has many more and I would suggest finding this issue if possible.